Stevie is more about feeling the music than anything else...
If it's learning the songs that's the issue then just keep working at them and it'll eventually get easier!
If it's actually sounding like stevie, I find some good tips are to practice your right hand technique, and learn to keep it chopping away at the strings. Also play HARD.. that's how he achieves his tone!

WiGGEDY has the right idea. Go on youtube and search how to play tightrope or texas flood etc. Then you need to listen, watch, listen, watch, listen......... If you have a tab book then just Listen and look at the tabs. Learn 1 bar at a time. SRV uses a lot of standard blues licks, but hes great because of how he phrases them.

Search Youtube for "Dennis Dullea" - He played and learned with the same people SRV learned from.

Also search "papastache" He has some awsome lessons on Youtube.

SRV used very heavy strings, on a good night he used 13's always tuned down half a step. He reportedly also had a killer handshake. You would need strong hands to play 13's but if you want to get the tone...